A startup company (startup or start-up) is an entrepreneurial venture which is typically a newly emerged, fast-growing business that aims to meet a marketplace need by developing a viable business model around an innovative product, service, process or a platform. A startup is usually a company designed to effectively develop and validate a scalable business model.

Can we draw the following conclusion?
A startup company is new and attempts to capitalize on an economic opportunity by filling a niche. 
Yes